Both come from PeopleCert — but they target different roles and career stages. Here's how Lean Six Sigma Green Belt (IASSC) and Lean Six Sigma Black Belt (IASSC) compare, and how to choose.
Read the full guide: Lean Six Sigma Green Belt Cost in 2026: One Exam, Three Price Lists →
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| LSS Green BeltLean Six Sigma Green Belt (IASSC) | LSS Black BeltLean Six Sigma Black Belt (IASSC) | |
|---|---|---|
| Level | Intermediate | Advanced |
| Exam length | 3h 0m | 4h 0m |
| Questions (real exam) | ~100 | ~150 |
| Pass mark | 70% | 70% |
| In a sentence | DMAIC process improvement — the IASSC standard. | DOE and deep statistics — lead improvement projects. |
| Free practice | 154 sample questions | 158 sample questions |
Exam parameters are compiled from each vendor's official exam guide. Always confirm the current format, eligibility and fees on the official PeopleCert site before booking. ExamDeck is an independent study tool and is not affiliated with PeopleCert.
Figures as published by each vendor, transcribed on the date shown. Where a vendor prices differently for members, both prices are listed.
| LSS Green Beltfacts as of September 2026 | LSS Black Beltfacts as of September 2026 | |
|---|---|---|
| Fees | Exam voucher - IASSC store: $402 (the IASSC certification page still says $350; verified 22 Sep 2026) Exam voucher - PeopleCert: €361, about $415 - same exam, other storefront of the same group (verified 22 Sep 2026) Practice exam (optional, not included): IASSC evaluation exam $78 / PeopleCert mock €62 Prerequisites / project / training: None required Recertification (every 3 yrs): 50-question, 90-minute exam at 70% - $268 IASSC store / €243 PeopleCert |
Exam voucher - IASSC store: $516 (the IASSC certification page still says $450; verified 22 Sep 2026) Exam voucher - PeopleCert: €464, about $533 - same exam, other storefront of the same group (verified 22 Sep 2026) Prerequisites / project / training: None required Recertification (every 3 yrs): 75-question, 120-minute exam at 70% - $335 IASSC store / €304 PeopleCert |
| Study time | commonly reported 40–80 hours depending on prior statistics background | commonly reported 40–140 hours over 4–12 weeks, depending on statistics background |
| Renewal | Every 3 years - a 50-question, 90-minute recertification exam at 70%, max two attempts two weeks apart; $175 on IASSC's policy page but $268 in IASSC's store and €243 via PeopleCert (verified 22 Sep 2026) | Every 3 years - a 75-question, 120-minute recertification exam at 70%, €304 via PeopleCert (verified 14 Sep 2026) |
| Entry requirement | None — IASSC/PeopleCert require no training course, work experience or completed project (in contrast to ASQ). | None — no prior certification, work experience or completed project required (training and project experience recommended). |
| Body of knowledge | the IASSC Lean Six Sigma Green Belt Body of Knowledge | the IASSC Lean Six Sigma Black Belt Body of Knowledge |
| Full fact pages | LSS Green Belt cost · format · eligibility | LSS Black Belt cost · format · eligibility |
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Both come from PeopleCert. LSS Green Belt (Lean Six Sigma Green Belt (IASSC)) is a Intermediate credential, while LSS Black Belt (Lean Six Sigma Black Belt (IASSC)) is a Advanced credential. They differ mainly in target role, exam length and depth.
The LSS Green Belt exam runs about 3h 0m with ~100 questions; the LSS Black Belt exam runs about 4h 0m with ~150 questions. The more senior credential generally demands more applied, scenario-based judgement.
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